US5354529A - Melt spinning apparatus and method - Google Patents

Melt spinning apparatus and method Download PDF

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Publication number
US5354529A
US5354529A US07/617,143 US61714390A US5354529A US 5354529 A US5354529 A US 5354529A US 61714390 A US61714390 A US 61714390A US 5354529 A US5354529 A US 5354529A
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United States
Prior art keywords
melt
nozzle
spinning
block
piston
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Expired - Fee Related
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US07/617,143
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English (en)
Inventor
Hans-Peter Berger
Ralph Sievering
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Oerlikon Barmag AG
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Barmag AG
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Assigned to BARMAG AG reassignment BARMAG AG ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BERGER, HANS-PETER, SIEVERING, RALPH
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/08—Supporting spinnerettes or other parts of spinnerette packs

Definitions

  • the present invention relates to a melt spinning apparatus for spinning a plurality of synthetic filaments, and of the general type disclosed in U.S. Pat. Nos. 4,698,008 and 4,645,444.
  • U.S. Pat. No. 4,645,444 discloses a melt spinning apparatus wherein a plurality of nozzle openings are supplied by a single pump. This is acceptable for all cases of application, wherein a single yarn is formed from all of the spun filaments. When in such a case a nozzle opening is fully or partially clogged, the melt flow will distribute over the remaining nozzle openings. However, the denier of the individual filaments will change only slightly corresponding to the large number of filaments, and the total denier of the yarn will be maintained.
  • synthetic monofilaments i.e. monofilament yarns
  • yarns made of a few such monofilaments in which the denier of the individual filaments and the denier of the yarn remain substantially constant regardless of whether or not any of the several nozzle openings is congested.
  • a melt spinning apparatus which comprises a heater jacket having a cylindrical inside jacket defining a cylindrical nozzle shaft which is open at its bottom, and block means having a plurality of melt delivery lines therein and positioned to close the upper portion of the nozzle shaft.
  • a cylindrical nozzle head is closely received in the lower portion of the nozzle shaft and is attached to the bottom of the block means.
  • the nozzle head has a plurality of vertical bores therein which are positioned in a generally circular arrangement about the central axis of the nozzle shaft, and a nozzle assembly is positioned in each of the bores.
  • Each nozzle assembly comprises a melt delivery duct communicating with one of the delivery ducts in the block means, and a spinning nozzle is positioned in the lower portion of the bore, and with the spinning nozzle having one or more openings extending vertically therethrough.
  • a separate melt delivery means is provided for delivering pressurized melt at a predetermined flow rate to each of the melt delivery ducts of the nozzle assemblies, and such that the pressurized melt is delivered to each nozzle assembly and extruded downwardly through the spinning nozzle of each nozzle assembly.
  • the present invention is based upon the knowledge that hydraulic measures for a uniform distribution of the melt flows to the individual nozzle openings are ultimately not successful.
  • a self-regulating effect occurs, in which the clogging of a nozzle is made up for by a corresponding increase of pressure with the result that the melt throughput remains substantially constant.
  • the apparatus further includes a planetary gear pump having a plurality of discharge outlets, with each of the outlets comprising one of the separate melt delivery means and which supplies one of the nozzle assemblies.
  • a planetary gear pump having a plurality of discharge outlets, with each of the outlets comprising one of the separate melt delivery means and which supplies one of the nozzle assemblies.
  • Both the nozzle head and the surrounding nozzle shaft are preferably cylindrical in configuration and have a circular cross section, which is very favorable with regard to their manufacture, since the nozzle head can be made on a rotary lathe. Moreover, it is especially advantageous also in terms of thermoengineering, since it ensures uniform heat distribution throughout the individual nozzle assemblies.
  • the nozzle head is preferably attached to the distributor block or the pump block by means of a threaded bolt which extends along the central axis of the nozzle shaft, and which is centrally located with respect to the circularly arranged nozzle assemblies.
  • a threaded bolt which extends along the central axis of the nozzle shaft, and which is centrally located with respect to the circularly arranged nozzle assemblies.
  • Each nozzle assembly is preferably provided with a piston mounted for limited axial movement in the upper portion of the bore, and so as to define a cavity between the spinning nozzle and the piston.
  • FIG. 1 is a sectional side elevation view of a melt spinning apparatus which embodies the features of the present invention
  • FIG. 2 is a bottom plan view of the apparatus shown in FIG. 1;
  • FIG. 3 is a view similar to FIG. 2, but illustrating an embodiment which includes several nozzle heads.
  • FIG. 1 illustrates a melt spinning apparatus which is accommodated in a heater box 1.
  • the heater box 1 is a cylindrical body with an inside jacket and an outside jacket. The two jackets form between them a hermetically sealed hollow space, which is filled with a heating medium such as a heating fluid.
  • the cylindrical inside jacket 2 of the heater box also defines a cylindrical nozzle shaft, which is vertically oriented to define a vertical central axis.
  • the cylindrical nozzle shaft 2 is provided with a shoulder 3 adjacent its lower end, on which a distributor block 4 rests.
  • the distributor block 4 fills the cross section of the nozzle shaft almost completely in the upper portion thereof.
  • the pump block S Located above the distributor block 4 is the pump block S.
  • the latter contains several gear pumps, which are here only schematically indicated. According to the present invention, it is preferred to use planetary gear pumps, each comprising a central gear and several planetary gears distributed over its circumference and engaging with the central gear.
  • a planetary gear pump useful with the present invention is disclosed in U.S. Pat. No. 3,498,230 to Schippers, the disclosure of which is expressly incorporated herein by reference.
  • the pump is supplied via a melt supply line 6 and discharges into pump or melt delivery lines 7.
  • the melt supply line 6 and the melt delivery lines 7 are arranged in the distributor block 4.
  • the central gears of the two pumps are synchronously driven by a single pump shaft 21.
  • the melt line 6 is arranged in the distributor block 4, and it connects the pump with an extruder line 24.
  • the extruder line 24 receives a molten, spinable polymer, for example polyethyleneterephalate, from a spinning extruder (not shown).
  • the extruder line is surrounded by an insulating jacket and extends through the hollow space between the nozzle shaft 2 and the outer jacket of the heater box 1 by means of a cylindrical tube 25 welded thereto in a manner resistant to compression.
  • the melt delivery lines 7 are formed in the distributor block 4. Each of these lines 7 connects a pump outlet with a nozzle assembly 10. It should be emphasized that a planetary gear pump forms with each of its planetary gears a separate melt delivery means, whose pressure buildup and flow rate are independent of the pressure buildup and flow rate of the other melt delivery means. Thus, a planetary gear pump comprising a central gear and four planetary gears represents four separate melt delivery means in the meaning of the present application. Technically viewed, the two planetary gear pumps, as illustrate, thus form eight melt delivery means. Each of these eight melt delivery means is connected respectively via a melt delivery line 7 with a nozzle assembly 10.
  • the spinning apparatus comprises eight nozzle assemblies 10.
  • the nozzle assemblies 10 are identical in their construction.
  • a nozzle head 9 serves to accommodate the nozzle assemblies, and the head 9 is in the form of a cylindrical body, whose outer circumference is closely received into the lower portion of the nozzle shaft 2.
  • the nozzle head is attached to the distributor block 4 by means of a central bolt 8.
  • the head 9 is provided on its side facing the distributor block 4 with a ring 20, which allows the nozzle head to be firmly bolted to the distributor block 4 by means of the bolt 8.
  • the nozzle head 9 also includes an axial grove 22 along its periphery, which engages with a wedge 23.
  • the wedge 23 is attached to the inner wall of the nozzle shaft 2. The groove and wedge allow a straight guidance of the nozzle head in the axial direction.
  • the nozzle head On a circle concentric with the central axis, the nozzle head includes eight circular-cylindrical bores, which receive each the nozzle assemblies 10, and which include a spinning nozzle 12, a filter plate 13, a filter 14, a sealing ring 16 and a sealing piston 15.
  • each nozzle assembly 10 In its upper portion, each nozzle assembly 10 has a larger diameter, which forms a shoulder 26 relative to the lower portion.
  • the spinning nozzle 12 may preferably be a monofilament nozzle, through which only one filament is spun. However, it is also possible to spin several filaments. Yet, it is preferred to apply the present invention to the spinning of monofilaments.
  • the spinning nozzle 12 rests on a circular shoulder 11, which defines the lower end of each nozzle assembly 10 and allows only the passage of the nozzle 12.
  • the filter plate 13 serves to support the filter 14. These elements have the smaller diameter of the bore, while both the sealing ring 16 and sealing piston 15 have the larger diameter.
  • the sealing piston 15 is slidable guided in the bore with limited play. In its center, it is provided with a melt delivery duct 19. Located on its front side facing the distributor block 4 is a centric, annular extension 18 with a connection seal 17.
  • the connection seal 17 consists, for example, of a soft metal, which comes to lie sealable against the distributor block 4 by the forces being operative on the sealing piston 15. It should be emphasized that the melt delivery duct 19 is aligned respectively with one of the melt delivery lines 7.
  • the melt delivery line 7 and the delivery duct 19 supply the respective nozzle assembly 10 with melt under pressure.
  • a pressure builds up in the cavity formed between the piston 15 and the spinning nozzle 12.
  • the gap between the wall of the bore and the sealing piston 15 is sealed by the sealing ring 16, which pushes itself into the gap as a result of the pressure buildup.
  • the sealing ring 16 is an angular ring, which covers the gap, but simultaneously leaves the delivery duct 19 uncovered. Stated otherwise, the arrangement is a self-sealing system, as is also described in a similar manner in the above mentioned U.S. Pat. No. 4,645,444.
  • both the sealing ring 16 and the sealing piston 15 have an enlarged diameter and therefor rest on the shoulder 26.
  • the axial extension of this enlarged diameter is so large that in the assembled state the connection seal 17 contacts the distributor block 4 substantially free of play.
  • the distributor block 4 and the pump block 5 are first inserted into the nozzle shaft 2. Then, the distributor block 4 is connected with the extruder line 24. Likewise, the pump block 5 is secured from the top to the distributor block in a manner not shown and anchored in the nozzle shaft.
  • FIG. 1 indicates by the arrows, that the pump block 5 is pushed by insertion forces from the top against the distributor block 4, and the distributor block 4 against the shoulder 3.
  • the spinning head 9 is assembled. This means that the spinning nozzle 12, the filter plate 13, the filter 14, the sealing ring 16 and the sealing piston 15 with connection seal 17 are successively inserted into the bore of each nozzle assembly 10 from the top. Thereafter the nozzle head 9 is mounted to the bottom of the distribution block 4. To this end, the nozzle head is inserted into the open end of the spinning shaft and mounted by means of bolt 8 to the distribution block 4. Since each of the pistons is mounted to its respective bore in such a way that its connecting seal contacts the distributor block substantially free of play, when the nozzle head 9 is mounted to the distributor block, the installation may now be pressurized.
  • the heater box shown in FIG. 3 corresponds in its construction to the heater box disclosed in U.S. Pat. No. 4,698,008, i.e. the heater box is constructed as a beam. Its underside is provided with the nozzle shafts 2, and each of the nozzle shafts comprises a nozzle head 9 with eight nozzle pots.
  • the construction of the nozzle heads 9 corresponds to the above description of FIGS. 1 and 2.
  • the spinning apparatus illustrated in FIGS. 1 and 2 is compact in its construction and therefore spatially favorable for the heat transfer
  • the spinning apparatus of FIG. 3 distinguishes itself in that several spinning head can be accommodated in a single heater box. Which of the embodiments is to be preferred depends on the spatial conditions. Because of its design favorable from a viewpoint of heating engineering, the embodiment of FIG. 1 is especially suitable for the production of monofilaments, which must exhibit a particularly high dimensional accuracy from filament to filament and over the length of the filament.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US07/617,143 1989-11-27 1990-11-23 Melt spinning apparatus and method Expired - Fee Related US5354529A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939138 1989-11-27
DE3939138 1989-11-27

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US5354529A true US5354529A (en) 1994-10-11

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Country Status (4)

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US (1) US5354529A (ko)
EP (1) EP0436105B1 (ko)
KR (1) KR930012184B1 (ko)
DE (1) DE59003082D1 (ko)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618566A (en) * 1995-04-26 1997-04-08 Exxon Chemical Patents, Inc. Modular meltblowing die
US5637331A (en) * 1993-02-18 1997-06-10 Barmag Ag Spin system for thermoplastic yarns
US5733586A (en) * 1994-11-10 1998-03-31 Barmag Ag Spin beam for spinning a plurality of synthetic filament yarns and its manufacture
US6083432A (en) * 1996-09-04 2000-07-04 Barmag Ag Melt spinning apparatus
US6261080B1 (en) 1996-12-18 2001-07-17 Barmag Ag Spin beam for spinning synthetic filament yarns
US6357762B1 (en) * 1998-05-13 2002-03-19 Zimmer Aktiengesellschaft Sealing element for melt channels
US20030234463A1 (en) * 2002-06-20 2003-12-25 3M Innovative Properties Company Meltblowing apparatus employing planetary gear metering pump
US6846450B2 (en) 2002-06-20 2005-01-25 3M Innovative Properties Company Method for making a nonwoven web
US20050017400A1 (en) * 2003-07-23 2005-01-27 Nordson Corporation Linear flow equalizer for uniform polymer distribution in a spin pack of a meltspinning apparatus
US6932870B2 (en) * 2002-05-03 2005-08-23 Kimberly-Clark Worldwide, Inc. System and process for dispensing an adhesive onto a core during the formation of rolled products
US20090324948A1 (en) * 2005-07-28 2009-12-31 Teijin Fibers Limited (Dope-Dyed) Polyester Monofilament

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236570A1 (ko) * 1991-12-06 1993-06-09 Akzo N.V., Arnheim/Arnhem, Nl
DE102010005219A1 (de) 2009-02-11 2010-08-12 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Schmelzspinnen synthetischer Filamente
JP5448935B2 (ja) * 2010-03-01 2014-03-19 Ｔｍｔマシナリー株式会社 紡糸パック
KR101511000B1 (ko) * 2014-11-21 2015-04-10 김순환 중공원사 제조장치

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841821A (en) * 1952-02-19 1958-07-08 Ici Ltd Melt spinning apparatus with removable spinning assembly
US3498230A (en) * 1965-04-14 1970-03-03 Heinz Schippers Spinning apparatus for multicomponent threads
DE2022224A1 (de) * 1970-05-06 1971-11-18 Barmag Barmer Maschf Totraumfreie Schmelzeverteilung
DE2113327A1 (de) * 1971-03-19 1972-10-12 Reifenhaeuser Kg Vorrichtung zur Herstellung von schmelzgesponnenen Fasern
US3724492A (en) * 1971-05-05 1973-04-03 Barmag Barmer Maschf Distributor for viscous fluid spinning melts or solutions
US3881850A (en) * 1974-01-02 1975-05-06 Eastman Kodak Co Melt spinning tower module and circular melt spin block therefor
US3938925A (en) * 1974-09-11 1976-02-17 Allied Chemical Corporation Spin pack assembly
EP0122464A2 (de) * 1983-03-23 1984-10-24 B a r m a g AG Spinnkopf zum Schmelzspinnen endloser Fäden
US4648826A (en) * 1984-03-19 1987-03-10 Toray Industries, Inc. Melt-spinning apparatus
US4698008A (en) * 1984-06-22 1987-10-06 Barmag Ag Melt spinning apparatus
DE3818017A1 (de) * 1987-06-06 1988-12-15 Barmag Barmer Maschf Spinnkopf
US4801257A (en) * 1986-12-16 1989-01-31 Barmag Ag Melt spinning apparatus
EP0363317A2 (en) * 1988-10-03 1990-04-11 FILTECO S.p.A. Melt-spinning apparatus and method

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841821A (en) * 1952-02-19 1958-07-08 Ici Ltd Melt spinning apparatus with removable spinning assembly
US3498230A (en) * 1965-04-14 1970-03-03 Heinz Schippers Spinning apparatus for multicomponent threads
DE2022224A1 (de) * 1970-05-06 1971-11-18 Barmag Barmer Maschf Totraumfreie Schmelzeverteilung
DE2113327A1 (de) * 1971-03-19 1972-10-12 Reifenhaeuser Kg Vorrichtung zur Herstellung von schmelzgesponnenen Fasern
US3824050A (en) * 1971-03-19 1974-07-16 Reifenhaeuser Kg Apparatus for spinning synthetic-resin filaments
US3724492A (en) * 1971-05-05 1973-04-03 Barmag Barmer Maschf Distributor for viscous fluid spinning melts or solutions
US3881850A (en) * 1974-01-02 1975-05-06 Eastman Kodak Co Melt spinning tower module and circular melt spin block therefor
US3938925A (en) * 1974-09-11 1976-02-17 Allied Chemical Corporation Spin pack assembly
EP0122464A2 (de) * 1983-03-23 1984-10-24 B a r m a g AG Spinnkopf zum Schmelzspinnen endloser Fäden
US4645444A (en) * 1983-03-23 1987-02-24 Barmag Barmer Maschinenfabrik Aktiengesellschaft Melt spinning apparatus
US4648826A (en) * 1984-03-19 1987-03-10 Toray Industries, Inc. Melt-spinning apparatus
US4698008A (en) * 1984-06-22 1987-10-06 Barmag Ag Melt spinning apparatus
US4801257A (en) * 1986-12-16 1989-01-31 Barmag Ag Melt spinning apparatus
DE3818017A1 (de) * 1987-06-06 1988-12-15 Barmag Barmer Maschf Spinnkopf
EP0363317A2 (en) * 1988-10-03 1990-04-11 FILTECO S.p.A. Melt-spinning apparatus and method
US5059104A (en) * 1988-10-03 1991-10-22 Filteco S.P.A. Melt spinning apparatus

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5637331A (en) * 1993-02-18 1997-06-10 Barmag Ag Spin system for thermoplastic yarns
US5733586A (en) * 1994-11-10 1998-03-31 Barmag Ag Spin beam for spinning a plurality of synthetic filament yarns and its manufacture
US5927590A (en) * 1994-11-10 1999-07-27 Barmag Ag Spin beam for spinning a plurality of synthetic filament yarns and its manufacture
US5618566A (en) * 1995-04-26 1997-04-08 Exxon Chemical Patents, Inc. Modular meltblowing die
US6083432A (en) * 1996-09-04 2000-07-04 Barmag Ag Melt spinning apparatus
US6261080B1 (en) 1996-12-18 2001-07-17 Barmag Ag Spin beam for spinning synthetic filament yarns
US6357762B1 (en) * 1998-05-13 2002-03-19 Zimmer Aktiengesellschaft Sealing element for melt channels
US6932870B2 (en) * 2002-05-03 2005-08-23 Kimberly-Clark Worldwide, Inc. System and process for dispensing an adhesive onto a core during the formation of rolled products
US6824733B2 (en) 2002-06-20 2004-11-30 3M Innovative Properties Company Meltblowing apparatus employing planetary gear metering pump
US6846450B2 (en) 2002-06-20 2005-01-25 3M Innovative Properties Company Method for making a nonwoven web
US20050054254A1 (en) * 2002-06-20 2005-03-10 3M Innovative Properties Company Method for making a nonwoven web
US20030234463A1 (en) * 2002-06-20 2003-12-25 3M Innovative Properties Company Meltblowing apparatus employing planetary gear metering pump
US20070237849A1 (en) * 2002-06-20 2007-10-11 3M Innovative Properties Company Nonwoven web forming apparatus
CN100347349C (zh) * 2002-06-20 2007-11-07 3M创新有限公司 熔体熔喷装置和采用此装置制造纤维网的方法
US7690902B2 (en) 2002-06-20 2010-04-06 3M Innovative Properties Company Nonwoven web forming apparatus
US20050017400A1 (en) * 2003-07-23 2005-01-27 Nordson Corporation Linear flow equalizer for uniform polymer distribution in a spin pack of a meltspinning apparatus
US7175407B2 (en) 2003-07-23 2007-02-13 Aktiengesellschaft Adolph Saurer Linear flow equalizer for uniform polymer distribution in a spin pack of a meltspinning apparatus
US20090324948A1 (en) * 2005-07-28 2009-12-31 Teijin Fibers Limited (Dope-Dyed) Polyester Monofilament
US7846544B2 (en) * 2005-07-28 2010-12-07 Teijin Fibers Limited (Dope-dyed) polyester core-sheath monofilament having specific core/sheath intrinsic viscosity

Also Published As

Publication number Publication date
EP0436105A3 (en) 1992-05-13
DE59003082D1 (de) 1993-11-18
EP0436105A2 (de) 1991-07-10
EP0436105B1 (de) 1993-10-13
KR930012184B1 (ko) 1993-12-24
KR910009970A (ko) 1991-06-28

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Owner name: BARMAG AG, 5630 REMSCHEID 11, FEDERAL REPUBLIC OF

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